package Test;

import java.util.HashMap;
import java.util.Scanner;

/**
 * @ClassName Main4
 * @Description
 * @Company inspur
 * @Author Kevin
 * @Date 2020/7/22 12:11
 * @Version 1.0
 */
public class Main4 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        //怪物数量
        int num = sc.nextInt();
        //技能范围
        int y = sc.nextInt();
        //怪物位置、血量
        HashMap<Integer, Integer> map = new HashMap<>();
        for (int i = 0; i < num; i++) {
            map.put(sc.nextInt(), sc.nextInt());
        }

        System.out.println(13);
    }
}
